4s-s-3=18

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Solution for 4s-s-3=18 equation: 



4s-s-3=18

We move all terms to the left:

4s-s-3-(18)=0

We add all the numbers together, and all the variables

3s-21=0

We move all terms containing s to the left, all other terms to the right

3s=21

s=21/3

s=7

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